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Article | REF: M218 V1

Gases in foundry aluminum alloys

Author: Jean CHARBONNIER

Publication date: April 10, 1991 | Lire en français

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    1. Solubility of hydrogen in aluminum

    Hydrogen solubility in aluminum alloys depends on three factors:

    • temperature ;

    • the composition of the atmosphere in contact with the alloy;

    • alloy composition.

    1.1 Effect of temperature

    This is undoubtedly the factor with the greatest influence on gassing problems. The solubility of hydrogen in pure aluminum, expressed in Ncm 3 /100 g, varies as shown in figure 1 . An abrupt discontinuity appears during solidification. Aluminum is capable of dissolving twenty...

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